Don't swim after rain
Water quality in our rivers and at our beaches is generally pretty good over summer, except in poor weather conditions. Heavy rain flushes contaminants from urban and rural land into waterways and we strongly advise you not to swim for at least three days after heavy or prolonged rainfall – even if a site generally has good water quality.

The monitoring results are forwarded to District Councils who place public alerts on their websites based on Ministry for the Environment water quality guidelines.

Role of the Taranaki District Health Board

The Medical Officer of Health and Health Protection Officers have an advisory role when issues in the environment impact on the health of the public. They follow up and investigate cases of notifiable infectious diseases and work in partnership with the Regional and District Councils, community and Iwi on issues where there is a high population health risk.

What should I do if I believe that a water pollution incident could make someone unwell?

Please report all pollution incidents within Taranaki to the Taranaki Regional Council – call 0800 736 222 at any time, 24/7, including public holidays.

If someone is sick then call Healthline on 0800 611 116 or see a doctor.

If you feel that the pollution incident could make a large number of people unwell please contact a Health Protection Officer at the Taranaki District Health Board at 06 753 7798 or by emailing health.protection@tdhb.org.nz

What illnesses can you contract from swimming or surfing in contaminated water?

Diarrhoea

Vomiting

Respiratory illnesses, similar to flu-like symptoms

Skin, eye and ear infections

Abdominal pain, cramps, and nausea

Irritation of the skin, eyes, nose, and mouth, which may appear as an itch, redness or dermatitis.

Toxins can also affect the liver and the nervous system. People at greatest risk of a reaction are children, pregnant women, the elderly, and those with pre-existing medical conditions.

Who should I call if I think I have become unwell after contact with contaminated water?

See your GP or ring Healthline on 0800 611 116. Tell them you may have been exposed to contaminated water. Your doctor has been asked to notify the Medical Officer of Health of any people with possible reactions.

Is it safe to swim in or drink contaminated water?

No. You should avoid any skin contact with the water and avoid swallowing the water.

Can I eat shellfish from contaminated water?

No. Eating shellfish from affected areas should be avoided.

What are the health risks of contaminated recreational water?

There are a number of disease-causing bugs (called pathogens) that can survive in the sea, lakes and rivers for some time. The bugs mainly get into the water through human and animal faeces. When we come into contact with water that has been contaminated we expose ourselves to the bugs and risk getting sick.

What are Pathogens?

Pathogens cause disease in humans and animals. There are many different kinds of pathogens. Some of the more widely known are Campylobacter, Salmonella, Giardia, Cryptosporidium and viruses such as Norovirus that cause diarrhoea. There are also bugs that can cause skin or ear infections and flu-like illnesses. The pathogens are present in faeces and may enter our waterways through untreated sewage discharges, leaky sewerage pipes, septic tanks, stormwater, rural run-off and from birds.

Even when beaches, lakes and rivers meet health guidelines, there is still a small health risk when you swim at that spot. It is not possible to say there is zero risk to public health, especially where there are known sources of human and animal faeces near the water.

What are Cyanobacteria?

Cyanobacteria are commonly known as blue-green algae. When algae multiply rapidly we get a “algal bloom”, which occur naturally. Activities, such as taking water from rivers or adding nutrients to waterways, can make things worse.

Cyanobacteria can produce toxins, known as cyanotoxins. The toxins can be a threat to people and animals if present in drinking water, or if people and animals come into contact with the water.

Will wearing a wetsuit protect me from Cyanobacteria?

No, wearing a wetsuit or a rash vest will not protect you and could make any reaction worse. The cyanobacteria may accumulate in the collar and cuff areas and rub against your skin. This may cause a strong skin reaction in these areas.